using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using SteamKit2;
using System.IO;
using System.Threading;

namespace SteamBot
{
    class Program
    {
        static string user, pass;

        static SteamClient steamClient;
        static CallbackManager manager;
        static SteamUser steamUser;
        static SteamFriends steamFriends;

        static bool isRunning = false;

        static string authCode;

        static void Main(string[] args)
        {
            Console.Title = "SteamBot Console";
            Console.WriteLine("CTRL+C quits the program.");

            Console.Write("Username: ");
            user = Console.ReadLine();

            Console.Write("Password: ");
            pass = Console.ReadLine();

            SteamLogIn();
        }

        static void SteamLogIn()
        {
            steamClient = new SteamClient();

            manager = new CallbackManager(steamClient);

            steamUser = steamClient.GetHandler<SteamUser>();

            steamFriends = steamClient.GetHandler<SteamFriends>();

            new Callback<SteamClient.ConnectedCallback>(OnConnected);
            new Callback<SteamClient.DisconnectedCallback>(OnDisconnected, manager);

            new Callback<SteamUser.LoggedOnCallback>(OnLoggedOn, manager);
            new Callback<SteamUser.LoggedOffCallback>(OnLoggedOff, manager);

            new Callback<SteamUser.AccountInfoCallback>(OnAccountInfo, manager);
            new Callback<SteamFriends.FriendMsgCallback>(OnChatMessage, manager);

            new JobCallback<SteamUser.UpdateMachineAuthCallback>(OnMachineAuth, manager);

            isRunning = true;

            Console.WriteLine("Connecting to Steam...");

            steamClient.Connect();


            while (isRunning)
            {
                manager.RunWaitCallbacks(TimeSpan.FromSeconds(1));
            }
            Console.ReadKey();
        }

        static void OnConnected(SteamClient.ConnectedCallback callback)
        {
            if (callback.Result != EResult.OK)
            {
                Console.WriteLine("Unable to connect to steam: {0}", callback.Result);

                isRunning = false;
                return;
            }

            Console.WriteLine("Connected to Steam. \nLogging in {0}... \n", user);

            byte[] sentryHash = null;

            if(File.Exists("sentry.bin"))
            {
                byte[] sentryFile = File.ReadAllBytes("sentry.bin");

                sentryHash = CryptoHelper.SHAHash(sentryFile);
            }

            steamUser.LogOn(new SteamUser.LogOnDetails
            {
                Username = user,
                Password = pass,

                AuthCode = authCode,

                TwoFactorCode = twofactor,

                SentryFileHash = sentryHash,
            });
        }

        static void OnLoggedOn(SteamUser.LoggedOnCallback callback)
        {
            if(callback.Result != EResult.AccountLogonDenied)
            {
                Console.WriteLine("Account is SteamGuard protected.");

                Console.Write("Please enter the authentication code sent to the email at {0}: ", callback.EmailDomain);

                authCode = Console.ReadLine();

                return;
            }

            {
                if (callback.Result == EResult.AccountLogonDeniedNeedTwoFactorCode)
                {
                    Console.WriteLine("Please enter your authentication code\n");

                    twofactor = Console.ReadLine();

                    return;
                }
            }

            if(callback.Result != EResult.OK)
            {
                Console.WriteLine("Unable to log in to Steam: {0}\n", callback.Result);
                isRunning = false;
                return;
            }
            Console.WriteLine("{0} succesfully logged in.", user);

        }

        static void OnMachineAuth(SteamUser.UpdateMachineAuthCallback callback, JobID jobID)
        {
            Console.WriteLine("Updating sentry file...");

            byte[] sentryHash = CryptoHelper.SHAHash(callback.Data);

            File.WriteAllBytes("sentry.bin", callback.Data);

            steamUser.SendMachineAuthResponse(new SteamUser.MachineAuthDetails
            {
                JobID = jobID,
                FileName = callback.FileName,
                BytesWritten = callback.BytesToWrite,
                FileSize = callback.Data.Length,
                Offset =  callback.Offset,
                Result = EResult.OK,
                LastError = 0,
                OneTimePassword = callback.OneTimePassword,
                SentryFileHash = sentryHash,
            });

            Console.WriteLine("Done.");
        }

        static void OnDisconnected(SteamClient.DisconnectedCallback callback)
        {
            Console.WriteLine("\n {0} disconnected from Steam, reconnecting in 5...\n", user);

            Thread.Sleep(TimeSpan.FromSeconds(5));

            steamClient.Connect();
        }

        static void OnLoggedOff(SteamUser.LoggedOffCallback callback)
        {
            Console.WriteLine("Logged off from Steam: {0}", callback.Result);
        }

        static void OnAccountInfo(SteamUser.AccountInfoCallback callback)
        {
            steamFriends.SetPersonaState(EPersonaState.Online);

        }

        static void OnChatMessage(SteamFriends.FriendMsgCallback callback)
        {
            if(callback.EntryType == EChatEntryType.ChatMsg)
            {
                if (callback.Message.Length > 1)
                {
                    if(callback.Message.Remove(1) == "!")
                    {
                        string command = callback.Message;
                        if(callback.Message.Contains(" "))
                        {
                            command = callback.Message.Remove(callback.Message.IndexOf(' '));
                        }

                        switch(command)
                        {
                            case "!send":
                                break;
                        }
                    }
                }
            }
        }
        public static string[] seperate(int number,char seperator,string thestring)
        {
            string[] returned = new string[4];

            int i = 0;

            int error = 0;

            int lenght = thestring.Lenght;

            foreach(char c in thestring)
            {

            }
        }
    }
}